301 Stainless With Added Silicon – When Good Forming Is Needed at Super-High Tensiles

301si For High Strength Applications

301 stainless steel has been long used for compression spring applications. Full Hard and Extra Full Hard tempers have been the most commonly ordered conditions for traditional spring applications.

For those customers whose applications require high ductility at extra hard tempers beyond the traditional 301 capabilities, Ulbrich offers 301si.

301si stainless steel has more formability at super high tensiles due to the increase of silicon in the base metal.

Standard 301 has a silicon content of 1.0 max and 301 si increases that content to 1.0 -1.35. The extra silicon allows for good ductility at higher tensile strengths, increasing formability with less cracking. 301si improves the material’s ductility because yield strength is not as limited as with traditional 301. When selecting 301 or 301si for spring applications there are several things to consider.

Both traditional 301 and 301si are produced to ASTM A666

Typical End Uses for 301si:

  • Super high strength springs

  • Bellows

  • Fasteners

  • Snap Domes

  • Consumer Appliance

  • Blades and Cutlery

Call us today at 800-243-1676 or contact us to learn more about our stainless steel offerings.

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